<!doctype html>
<html>
	<head>
		<meta charset="utf-8" />
		<style>
			div{
				width:200px;
				height:100px;
				border:2px solid red;
				border-top-right-radius:100px 50px;/*右上角*/
				border-bottom-right-radius:100px 50px/*右下角*/
			}
		</style>
	</head>
	<body>
		<div>
			圆角属性设定方法---子弹头边框
		</div>
	</body>
</html>